One, Xanadu in 1980.
A=1c/1s=1cs-19 ampere
5 number 1s so far
There r 16 1s. Including the word one.
4
19 of them.
Light travels approximately 186,282 miles (299,792 kilometers) in one second.
42
1
1s + 1s + 1 = 2s + 1
6
4 different 1s
One million of them.